LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> GX 470 >> Repair and Diagnosis >> Electrical >> Gauges >> Meter >> Meter/Gauge System >> Multi-Display Power Source Circuit >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. INSPECT COMBINATION METER ASSEMBLY (TAU-B) 
    Fig 1: Identifying C11 Combination Meter Assembly (TAU-B) Connector Terminals
    G05266038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the combination meter assembly.
    2. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TESTER CONNECTION SPECIFIED CONDITION REFERENCE TABLE

    Tester connection Condition Specified condition
    C11-2 (TAU-B INPUT) - Body ground Ignition switch ON 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. INSPECT COMBINATION METER ASSEMBLY (TAU-G) 
    1. Check the input signal waveform.
      1. Remove the combination meter assembly.
        2. Fig 2: Identifying C11 Combination Meter Assembly (TAU-G) Connector Terminals
        G05266039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Connect the oscilloscope to terminal C11-3 (TAU-G INPUT) and body ground.
      3. Start the engine.
      4. Check the signal waveform according to the condition(s) in the table below.

    Waveform: 

    WAVEFORM REFERENCE TABLE

    Item Condition
    Tool setting 10V/DIV., 20 ms/DIV.
    Vehicle condition Engine idle speed
    Fig 3: Identifying Signal Waveform Graph
    G04966544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    As the engine speed goes higher, the frequency becomes shorter.

    NG: GO TO  ENGINE CONTROL SYSTEM 

    OK: REPLACE COMBINATION METER ASSEMBLY 

scientia non olet · About LEMON Manuals